While the ruling only applies in Manhattan, the opinion will
likely stop the FDA from pursuing convictions in similar cases
until the courts finally resolve the issue, experts told The
Times.

It's always been perfectly legal for doctors to prescribe drugs
for uses that the FDA hasn't approved. However, federal law has
barred drug companies from promoting medicine for anything other
than its officially approved use.

Caronia was convicted after being caught promoting narcolepsy
drug Xyrem for insomnia, fibromyalagia, and other condictions,
according to the Times.